android 4.0 禁用系统home键！亲测可用！

来源：互联网发布：ie修复软件编辑：程序博客网时间：2024/05/16 09:56

网上找到：

刚刚发现4.0上还有一种方法可以屏蔽和重写Home键，而且非常简单。代码如下：
    public static final int FLAG_HOMEKEY_DISPATCHED = 0x80000000;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.getWindow().setFlags(FLAG_HOMEKEY_DISPATCHED, FLAG_HOMEKEY_DISPATCHED);//关键代码
        setContentView(R.layout.main);
    }
    再重写onKey事件即可。

但是放在手机上测试大多都不行！只能再找！嘻嘻！

找了好久才找到的！亲测可用！

public class HomeKeyLocker {    private OverlayDialog mOverlayDialog;    public void lock(Activity activity) {        if (mOverlayDialog == null) {            mOverlayDialog = new OverlayDialog(activity);            mOverlayDialog.show();        }    }    public void unlock() {        if (mOverlayDialog != null) {            mOverlayDialog.dismiss();            mOverlayDialog = null;        }    }    private static class OverlayDialog extends AlertDialog {        public OverlayDialog(Activity activity) {            super(activity, R.style.OverlayDialog);            WindowManager.LayoutParams params = getWindow().getAttributes();            params.type = TYPE_SYSTEM_ERROR;            params.dimAmount = 0.0F; // transparent            params.width = 0;            params.height = 0;            params.gravity = Gravity.BOTTOM;            getWindow().setAttributes(params);            getWindow().setFlags(FLAG_SHOW_WHEN_LOCKED | FLAG_NOT_TOUCH_MODAL, 0xffffff);            setOwnerActivity(activity);            setCancelable(false);        }        public final boolean dispatchTouchEvent(MotionEvent motionevent) {            return true;        }        protected final void onCreate(Bundle bundle) {            super.onCreate(bundle);            FrameLayout framelayout = new FrameLayout(getContext());            framelayout.setBackgroundColor(0);            setContentView(framelayout);        }    }}

public class MainActivity extends ActionBarActivity implements CompoundButton.OnCheckedChangeListener {    private ToggleButton mTbLock;    private HomeKeyLocker mHomeKeyLocker;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        mHomeKeyLocker = new HomeKeyLocker();        mTbLock = (ToggleButton) findViewById(R.id.tb_lock);        mTbLock.setOnCheckedChangeListener(this);    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }    @Override    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {        if (buttonView == mTbLock) {            if (isChecked) {                mHomeKeyLocker.lock(this);            } else {                mHomeKeyLocker.unlock();            }        }    }    @Override    protected void onDestroy() {        super.onDestroy();        mHomeKeyLocker.unlock();        mHomeKeyLocker = null;    }}

 <style name="OverlayDialog" parent="@android:style/Theme.Dialog">        <item name="android:windowBackground">@android:color/transparent</item>        <item name="android:windowFrame">@null</item>        <item name="android:windowNoTitle">true</item>        <item name="android:windowIsFloating">true</item>        <item name="android:windowIsTranslucent">false</item>        <item name="android:backgroundDimEnabled">false</item>    </style>

项目：https://github.com/shaobin0604/Android-HomeKey-Locker

别忘了加上权限

<uses-permissionandroid:name="android.permission.SYSTEM_ALERT_WINDOW"/>

想要研究的自己研究吧！

感谢这位大神！

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